Relationship To The Ideal Transformer
An ideal gyrator is similar to an ideal transformer in being a linear, lossless, passive, memoryless two-port device. However, whereas a transformer couples the voltage on port 1 to the voltage on port 2, and the current on port 1 to the current on port 2, the gyrator cross-couples voltage to current and current to voltage. Cascading two gyrators achieves a voltage-to-voltage coupling identical to that of an ideal transformer.
Cascaded gyrators of gyration resistance and are equivalent to a transformer of turns ratio . Cascading a transformer and a gyrator, or equivalently cascading three gyrators produces a single gyrator of gyration resistance .
From the point of view of network theory, transformers are redundant when gyrators are available. Anything that can be built from resistors, capacitors, inductors, transformers and gyrators, can also be built using just resistors, gyrators and inductors (or capacitors)
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